1.to join, to fit together; so in Homer of carpenters, fastening together beams and planks to build houses, ships, etc.

2. of marriage: ἁρμόζειντίνιτήνθυγατέρα (Herodotus 9, 108) to betroth a daughter to anyone; passive ἁρμόζεταιγυνήἀνδρί, the Sept.Proverbs 19:14; middle ἁρμόσασθαιτήνθυγατέρατίνος (Herodotus 5, 32; 47; 6, 65) to join to oneself, i. e. to marry, the daughter of anyone; ἁρμόσασθαιτίνιτιναto betroth, to give one in marriage to anyone: 2 Corinthians 11:2, and often in Philo, cf. Loesner ad loc.; the middle cannot be said to be used actively, but refers to him to whom the care of betrothing has been committed; (cf. Buttmann, 193 (167); per contra Meyer at the passage; Winer's Grammar, 258 (242)).

Strong's Exhaustive Concordance

espouse.

From harmos; to joint, i.e. (figuratively) to woo (reflexively, to betroth) -- espouse.